ΔE 18.7, loose: different enough that you should pick on purpose. Gun Corps Brown is noticeably darker, more muted, cooler than Hemp Rope.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Gun Corps Brown is noticeably darker, more muted, cooler than Hemp Rope.
The same difference applies the other way round: Hemp Rope is noticeably lighter, more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Hemp Rope on the colour wheel See Gun Corps Brown on the colour wheel
All matches: Hemp Rope equivalents · Gun Corps Brown equivalents